矿山微功耗安全监测物联网系统的研究与应用

doi:10.11959/j.issn.1000-436x.2020034

Abstract

Abstract:

In view of the problems existing in the safety monitoring system of China’s mining enterprises,such as poor reliability,small coverage,high cost,weak maintenance and inaccurate early-warning,etc.,a new safety monitoring IoT system with micro power consumption was proposed for Chinese mines to provide effective technical support for the safety of mine production and operation.The key technologies such as micro-power consumption information collection,fault diagnosis and auto-recovery,energy-saving wireless communication,online intelligent data analysis and early warning had been broken through by the proposed system,which had been successfully applied in typical cases such as online monitoring of tailings ponds,open-pit slop and ground pressure of domestic mining enterprises.Field practice shows that the proposed system is more suitable for mine operation conditions than the existing conventional safety monitoring system,the SNR of new sensor is increased by 1.4 times,the comprehensive energy consumption is reduced by 10%,which is suitable for online intelligent analysis and rapid warning.

Key words: Internet of things (IoT), safety monitoring, cloud service, wireless communication

CLC Number:

TD76

Da ZHANG,Jinong WANG,Hu JI,Hao JI,Yunfeng ZHAO. Research and application of micropower safety monitoring IoT system for mine[J]. Journal on Communications, 2020, 41(2): 44-57.

Figures/Tables 13

References 27

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激励频率/Hz	信号类型	第一通道			第二通道
激励频率/Hz	信号类型	信号\|S\|²/V²	噪声\|N\|²/V²	SNR提高	信号\|S\|²/V²	噪声\|N\|²/V²	SNR提高
30	处理前	3.51	1.63×10^-4	2.26	3.51	7.26×10^-3	2.54
	处理后	3.51	7.22×10^-5		3.51	2.86×10^-3
60	处理前	5.73	1.79×10^-4	1.92	5.77	7.19×10^-3	2.63
	处理后	5.73	9.34×10^-5		5.77	2.73×10^-3
90	处理前	4.82	1.76×10^-4	1.96	4.88	7.31×10^-3	2.83
	处理后	4.82	8.97×10^-5		4.88	2.58×10^-3
120	处理前	4.14	1.16×10^-4	3.97	4.24	6.90×10^-3	3.15
	处理后	4.14	2.92×10^-5		4.24	2.19×10^-3
160	处理前	3.53	1.54×10^-4	2.12	3.62	7.30×10^-3	2.87
	处理后	3.53	7.27×10^-5		3.62	2.54×10^-3
210	处理前	3.02	1.71×10^-4	2.09	3.10	6.84×10^-3	2.82
	处理后	3.02	8.15×10^-5		3.10	2.43×10^-3
260	处理前	2.71	1.66×10^-4	2.10	2.79	7.04×10^-3	2.95
	处理后	2.71	7.90×10^-5		2.79	2.39×10^-3
330	处理前	2.63	1.79×10^-4	2.11	2.72	6.98×10^-3	2.82
	处理后	2.63	8.47×10^-5		2.72	2.48×10^-3
430	处理前	2.62	1.45×10^-4	2.37	2.72	7.10×10^-3	3.00
	处理后	2.62	6.10×10^-5		2.72	2.37×10^-3
630	处理前	2.37	1.51×10^-4	2.08	2.48	6.91×10^-3	3.06
	处理后	2.37	7.26×10^-5		2.48	2.26×10^-3
830	处理前	2.32	1.60×10^-4	2.27	2.43	6.89×10^-3	3.05
	处理后	2.32	7.02×10^-5		2.43	2.26×10^-3
930	处理前	2.30	1.51×10^-4	2.47	2.42	6.97×10^-3	3.05
	处理后	2.30	6.12×10^-5		2.42	2.29×10^-3
1 130	处理前	2.30	1.36×10^-4	2.43	2.43	6.71×10^-3	2.94
	处理后	2.30	5.62×10^-5		2.43	2.28×10^-3

激励频率/Hz	信号类型	第一通道			第二通道
激励频率/Hz	信号类型	信号\|S\|²/V²	噪声\|N\|²/V²	SNR提高	信号\|S\|²/V²	噪声\|N\|²/V²	SNR提高
30	处理前	3.51	1.63×10^-4	2.45	3.51	7.26×10^-3	2.68
	处理后	3.51	6.67×10^-5		3.51	2.71×10^-3
60	处理前	5.73	1.79×10^-4	2.06	5.77	7.19×10^-3	2.76
	处理后	5.73	8.70×10^-5		5.77	2.61×10^-3
90	处理前	4.82	1.76×10^-4	2.62	4.88	7.31×10^-3	2.94
	处理后	4.82	6.70×10^-5		4.88	2.49×10^-3
120	处理前	4.14	1.16×10^-4	4.33	4.24	6.90×10^-3	3.24
	处理后	4.14	2.67×10^-5		4.24	2.13×10^-3
160	处理前	3.53	1.54×10^-4	2.12	3.62	7.30×10^-3	2.87
	处理后	3.53	6.81×10^-5		3.62	2.45×10^-3
210	处理前	3.02	1.71×10^-4	2.19	3.10	6.84×10^-3	2.92
	处理后	3.02	7.79×10^-5		3.10	2.34×10^-3
260	处理前	2.71	1.66×10^-4	2.19	2.79	7.04×10^-3	3.05
	处理后	2.71	7.58×10^-5		2.79	2.31×10^-3
330	处理前	2.63	1.79×10^-4	2.67	2.72	6.98×10^-3	2.94
	处理后	2.63	7.87×10^-5		2.72	2.37×10^-3
430	处理前	2.62	1.45×10^-4	2.42	2.72	7.10×10^-3	3.07
	处理后	2.62	5.98×10^-5		2.72	2.31×10^-3
630	处理前	2.37	1.51×10^-4	2.25	2.48	6.91×10^-3	3.18
	处理后	2.37	6.72×10^-5		2.48	2.17×10^-3
830	处理前	2.32	1.60×10^-4	2.35	2.43	6.89×10^-3	3.16
	处理后	2.32	6.80×10^-5		2.43	2.18×10^-3
930	处理前	2.30	1.51×10^-4	3.52	2.42	6.97×10^-3	3.24
	处理后	2.30	4.30×10^-5		2.42	2.15×10^-3
1 130	处理前	2.30	1.36×10^-4	3.19	2.43	6.71×10^-3	3.05
	处理后	2.30	4.28×10^-5		2.43	2.20×10^-3

故障位置	故障源	状态类型	模型参数	阈值或标准
		短路		R＜50?
	线圈或信号线	正常	线圈电阻	50 ?≤R≤10 k?
		接触不良		10 k?＜R＜30 k?
传感器		断路或未接		R≥30 k?
传感器	振弦	正常	频率	f≥30 Hz
		故障		f＜30 Hz
		短路		R＜100?
	内置温度传感器	正常	热敏电阻	100 ?≤R≤50 k?
		断路或未接		R＞50 k?
		优		P＞-40 dBm
	无线信号质量	良	接收功率	-80 dBm≤P≤-40 dBm
诊断装置		差		P＜-80 dBm
诊断装置	主电源电量	正常	电源电压	V＞70%满电电压
		电量低		10%满电电压≤V≤70%满电电压
	储能能量	电量低	节点电压	V＜80%满电电压
		正常		V≥80%满电电压

测试项	测试电压/V	峰值电流/mA	峰值持续时间/ms	平均电流/mA	持续时间/ms	平均功耗/mW	耗电量/(mA·s)
按键响应	3.7	44	1.7	40	28	148	1.12
传感器采集	3.7	68	20	40	1 360	148	54.4
信息上报	3.7	130	1.7	44	14.5	162.8	0.638
指令接收	3.7	36	2	35	3 000	129.5	105
静态待机	3.7	0.008 1	—	0.008 1	—	0.029 97	—

Research and application of micropower safety monitoring IoT system for mine

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